According to Xinhua News Agency, the CF3 fuel assembly of the “Hualong No. 1” nuclear power plant is about to be put into commercial use for the first time. The key component, the N36 zirconium alloy cladding tube, was developed by Chinese scientists after 36 years of research and development. On the “Chinese core”. It is understood that the N36 zirconium alloy cladding tube is a thin tube with a diameter of 9.5 mm, a tube wall of only 0.57 mm and a length of nearly 4 meters, which is used to carry nuclear fuel. As a fuel coating material for water-cooled reactors, this thin tube is resistant to high pressure, high temperature, corrosion, and strong radiation, and has been monopolized by a few countries until now. Zhao Wenjin, 69, is the chief designer of the zirconium alloy material research and development project of China Nuclear Power Research and Design Institute. He started working on basic research on zirconium alloys in 1986, and after years of hard work, he and his team finally successfully developed N36 zirconium alloy cladding tubes. This major research achievement was achieved through the efforts of several generations, and the scientific research team experienced considerable hardships and setbacks in the process. During research and development, even if there are only micron-scale cracks in the pipe wall.
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